Phosphine is generally prepared in the laboratory by

heating white phosphorus with an aqueous solution of caustic soda.

heating phosphorus in a current of hydrogen.

decomposition of P 2 H 4 at 110 ° C .

heating red phosphorus with an aqueous solution of caustic soda.

What is inert pair effect?

The inert pair effect is the reluctance of s electrons of the outermost shell to participate in bonding. This is due to the poor screening effect of the d and f orbitals. This effect is observed among the p -block elements, due to which the lower oxidation state (two units less than the group oxidation state) becomes more stable for heavier elements in each group. For example in Pb , + 2 oxidation state is more predominant than the + 4 oxidation state.

Among the following, the correct statement(s) is(are)

The Lewis acidity of B C l 3 is greater than that of A l C l 3 .

A l C l 3 has the three-centre two-electron bonds in its dimeric structure.

E M B I B E

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-3>Q 101

MEDIUM

JEE Main/Advance

IMPORTANT

Earn 100

Match the catalysts to the correct processes:

Catalyst Process

(A) ${TiCl}_{3}$ ( $i$ ) Wacker process

(B) ${PdCl}_{2}$ ( $ii$ ) Ziegler-Natta polymerization

(C) ${CuCl}_{2}$ ( $iii$ ) Contact process

(D) $V_{2} O_{5}$ ( $iv$ ) Deacon's process

50% studentsanswered this correctly

Important Questions on The p-Block Elements

HARD

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-3>Q 102

Ammonia forms the complex ion

{[Cu {({NH}_{3})}_{4}]}^{2 +}

with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-3>Q 103

[X] + H_{2} {SO}_{4} \to [Y]

, a colourless gas with an irritating smell.

[Y] + K_{2} {Cr}_{2} O_{7} + H_{2} {SO}_{4} \to

green solution

[X]

and

[Y]

are

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-3>Q 104

Amongst

H_{2} O, H_{2} S, H_{2} Se

and

H_{2} Te

the one with highest boiling point is:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 1

Atomic number of

33, 51

represents the following family:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 2

Inert pair effect is observed in elements of which block:

MEDIUM

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 3

Which of the following statement is correct with respect to the property of elements in the carbon family with an increase in atomic number, their:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 4

The properties which are not common to both groups

1

and

17

elements in the periodic table are:

EASY

JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-4>Q 5

Which of the following has the highest electron affinity?

Learn and Prepare for any exam you want !

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	Catalyst		Process
(A)	${TiCl}_{3}$	( $i$ )	Wacker process
(B)	${PdCl}_{2}$	( $ii$ )	Ziegler-Natta polymerization
(C)	${CuCl}_{2}$	( $iii$ )	Contact process
(D)	$V_{2} O_{5}$	( $iv$ )	Deacon's process

Match the catalysts to the correct processes: Catalyst Process (A) TiCl3 (i) Wacker process (B) PdCl2 (ii) Ziegler-Natta polymerization (C) CuCl2 (iii) Contact process (D) V2O5 (iv) Deacon's process

Important Questions on The p-Block Elements

Learn and Prepare for any exam you want !

Match the catalysts to the correct processes:

Catalyst Process

(A) ${TiCl}_{3}$ ( $i$ ) Wacker process

(B) ${PdCl}_{2}$ ( $ii$ ) Ziegler-Natta polymerization

(C) ${CuCl}_{2}$ ( $iii$ ) Contact process

(D) $V_{2} O_{5}$ ( $iv$ ) Deacon's process